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  1. #1
    Registered StrikinLightnin's Avatar
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    1996 Fountain 42Lightning
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    Mechanical Fuel Pump For Gen V ???

    I'd like to retain the mechanical fuel pump for my Gen V engines that use the belt driven impeller/fuel pump.
    Is there an upgrade performance mechanical fuel pump for this application?
    Searching through some posts some have complained that the CP wasn't up to the task.
    Others have spoken something about using part of a performance Carter pump.
    CV products was also mentioned in some of the posts.
    I couldn't find what pump is available from CV even from their technical support.
    This would greatly help me out if members of the board could tell me what setup works best.

    Have A Great Holiday Season,
    Dennis

  2. #2
    Registered Crazyhorse's Avatar
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    38 Cigarette flat-deck
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    Re: Mechanical Fuel Pump For Gen V ???

    The rated fuel flow on the stock pump is something like 120 gallons per hour, more than enough for any application you might run.

  3. #3
    Charter Member Charter Member rbtnt's Avatar
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    2001 28 Eliminator Daytona
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    Re: Mechanical Fuel Pump For Gen V ???

    StrikinLightnin,

    You might have seen some of my posts on th CV pumps. I think the model was CA505. It will require a Mercury base and you will have to drill the threads out of the base since the Mercury and CV pieces both have threaded screw holes when put together. I have 4 seasons on mine without any trouble.

    I read somewhere that someone is making high output mechanical pumps a lot cheaper than doing it this way since I installed mine.

    This solution saves on the wiring, relays, brackets and low pressure cut off switches. My only drawback is filling the carb bowels if I take them both off. I usually fill the bowel through the vent tube with a hose. I have seen people crank them over forever and I have seen guys put in a small electric pump just to fill the carbs.

    I do carry a T fitting on a piece of fuel line, a cap for a fuel line and extra seapump belts in case I have a problem. If one of my pumps fail, I can run both engines from one pump by using the T fitting and capping the other pump. I did this because my 540s were the first ones my engine builder put mechanical pumps on at my persistence and we were not sure of the reliability. I didn't want to get stuck 300 - 400 miles from my trailer because of a fuel pump.

    Two years ago we are about 100 miles and my friend had a relay go bad on one of his mechanical pumps go bad. He was able to use my T fitting and fuel line to run both motors on one pump. His only problem was he was running fuel out of one tank for both motors. Since then, he carries an extra pump and I carry another piece of fuel line to run a pump from either tank.

  4. #4
    Charter Member Charter Member Cignificant's Avatar
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    1998 26' Boston Whaler
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    Re: Mechanical Fuel Pump For Gen V ???

    I've always just bolted the Merc base to a Holly Marine fuel pump. Runs twin-carb blowers just fine.
    Steve Gresham
    Hauling butt in my 26' Boston Whaler

  5. #5
    Platinum Member Platinum Member
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    2000 37 outerlimits Lets Rock
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    May 2003
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    Arnold,Md
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    194

    Re: Mechanical Fuel Pump For Gen V ???

    The CV pump for a merc seawater pump is CV2630. It is expensive, but will supply plenty of fuel.

  6. #6
    Registered StrikinLightnin's Avatar
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    Re: Mechanical Fuel Pump For Gen V ???

    Quote Originally Posted by PPlay33
    The CV pump for a merc seawater pump is CV2630. It is expensive, but will supply plenty of fuel.
    It sure is expensive
    Is this a pump made by CV or Merc?
    Is this a billet pump?
    They need to post a picture.

  7. #7
    Platinum Member Platinum Member
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    2000 37 outerlimits Lets Rock
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    Re: Mechanical Fuel Pump For Gen V ???

    This is a machined billet pump like the nascar pumps. It is expensive,but no extra wiring or plumbing like an electric. It has three valves in it, and has no problem with my 700hp. It can also be rebuilt for about 50.00 if it ever needs to.

  8. #8
    Registered StrikinLightnin's Avatar
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    1996 Fountain 42Lightning
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    Portage,IN
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    Re: Mechanical Fuel Pump For Gen V ???

    I ordered two CV pumps and all I can say is WOW!!
    What a beautiful fuel pump.
    The construction is first class and they're completely rebuildable.
    I've had problems with one of my engines running a couple of lean cylinders
    resulting in blown headgaskets.
    Now I can't blame the fuel pump!!
    Attached Images Attached Images

  9. #9
    Charter Member Charter Member rbtnt's Avatar
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    2001 28 Eliminator Daytona
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    Re: Mechanical Fuel Pump For Gen V ???

    Does this model fit on the seapump? When I bought my CV5505s, they did not have a base to fit the seapump.

    You will be happy with them.

  10. #10
    Registered StrikinLightnin's Avatar
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    1996 Fountain 42Lightning
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    Portage,IN
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    Re: Mechanical Fuel Pump For Gen V ???

    Quote Originally Posted by rbtnt
    Does this model fit on the seapump? When I bought my CV5505s, they did not have a base to fit the seapump.

    You will be happy with them.
    rbtnt

    I ran downstairs pulled off the Carter and the arm is the same.
    Fits on the seapump.
    The pump rocks


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